The exterior paint on my house is developing mildew, but I can't figure out why. I had my house painted 5 years back. Two sides of the house are now mildewed and have peeling paint in a couple of places. A third side is starting to show mildew. The fourth looks as good as new. The side of the house that is just starting to mildew gets sun all day long. The side that looks the best gets the least amount of sun. None of the other houses on my street have mildew. Any ideas about where the mildew is coming from? I'll have the house washed and repainted, but is there something else I can do to prevent mildew? Thanks.

I have to replace some outside trim wood which has rotted over the years, I'am going to replace it with pressure treated lumber. Can I paint pressure treated wood without any type of prep? dftodd